期刊
PHYSICAL REVIEW E
卷 82, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.82.031306
关键词
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资金
- Spanish Government [FIS2008-06034-C02-01]
- AECI [A/9903/07]
- PIUNA (Universidad de Navarra)
- Fundacion Ramon Areces
- CONICET (Argentina)
- Asociacion de Amigos de la Universidad de Navarra
We present experimental results on the shape of arches that block the outlet of a two-dimensional silo. For a range of outlet sizes, we measure some properties of the arches such as the number of particles involved, the span, the aspect ratio, and the angles between mutually stabilizing particles. These measurements shed light on the role of frictional tangential forces in arching. In addition, we find that arches tend to adopt an aspect ratio (the quotient between height and half the span) close to 1, suggesting an isotropic load. The comparison of the experimental results with data from numerical models of the arches formed in the bulk of a granular column reveals the similarities of both, as well as some limitations in the few existing models.
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